Question: please explain it with manual calculation as well There is a change in student scores due to online learning, therefore, teacher observes the student exam

please explain it with manual calculation as well

There is a change in student scores due to online learning, therefore, teacher observes the student exam scores. The table below shows: students who get good grades, marked with "", however, there are still some students who are struggling with online learning and one student is unaffected. Can he teacher needs to conclude that the students get better score with online learning. (significance level: 0.05). ""= students with good grades. -ME students with bad grades. "O" = students with so-so grade 1 2 LU 4 5 6 7 10 11 12 13 14 w

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